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发明名称
BUSY SOUND DETECTION SYSTEM
摘要
申请公布号
JPH04334291(A)
申请公布日期
1992.11.20
申请号
JP19910105332
申请日期
1991.05.10
申请人
NEC CORP
发明人
KOYAMA KAZUHIKO
分类号
H04Q3/42
主分类号
H04Q3/42
代理机构
代理人
主权项
地址
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